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CAMBRIDGE INTERNATIONAL EXAMINATIONS
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GCE Ordinary Level
MARK SCHEME for the October/November 2013 series
5054 PHYSICS
5054/42
Paper 4 (Alternative to Practical), maximum raw mark 30
This mark scheme is published as an aid to teachers and candidates, to indicate the requirements of
the examination. It shows the basis on which Examiners were instructed to award marks. It does not
indicate the details of the discussions that took place at an Examiners’ meeting before marking began,
which would have considered the acceptability of alternative answers.
Mark schemes should be read in conjunction with the question paper and the Principal Examiner
Report for Teachers.
Cambridge will not enter into discussions about these mark schemes.
Cambridge is publishing the mark schemes for the October/November 2013 series for most IGCSE,
GCE Advanced Level and Advanced Subsidiary Level components and some Ordinary Level
components.
Page 2
1
Mark Scheme
GCE O LEVEL – October/November 2013
Syllabus
5054
(a) (i) measuring force just before it jumps
reading meter and pulling magnet at same time
force varies/not constant
B1
[1]
B1
[1]
(b) 5.5 ± 0.1 N unit required
B1
[1]
(c) (i) axes: correct way round, labelled quantity and unit (on y-axis only)
B1
(ii) sensible suggestion, e.g.
use of two people explained
pull slowly
repeat
video newton meter
scales: linear, not awkward
x-axis: e.g. 2 cm ≡ 1 y-axis: e.g. 2 cm ≡ 1 N
B1
points plotted accurately within ½ small square
neat crosses or small points (in circle)
B1
smooth curve of best fit drawn
B1
[4]
B1
[1]
(d) newton meter not sensitive enough
scale too big
no change/same reading
reading/force is too small (for this meter)/no force
B1
[1]
(e) (i) new paper/second expt (thicker) as force smaller (or reverse argument)
paper that gives 3.0 N force
B1
[1]
B1
[1]
(f) yes + aluminium non-magnetic
B1
[1]
(a) diagram showing paper and plain mirror
plus incident and reflected rays OR four roughly correct pins
B1
(ii) increasing n decreases F
inverse relationship
(ii) more sensitive
more readings
larger values for F
2
Paper
42
2 pins placed on incident ray
B1
pins or image (of pins) viewed in/through mirror
B1
lines drawn and angles i and r measured to normal
B1
© Cambridge International Examinations 2013
[4]
Page 3
3
Mark Scheme
GCE O LEVEL – October/November 2013
Syllabus
5054
(b) sensible suggestion, e.g.
view bottom of pins
pins vertical
pins far apart, e.g. greater than 5 cm
repeat for different angles/repeat experiment
sharp pencil
B1
[1]
(a) (i) 0.9 V cao (unit required)
B1
[1]
(ii) crocodile clips
tight connections explained, e.g. wrap wire and tape
B1
[1]
(iii) same value/0.9 V and needle to right
B1
[1]
(b) sensible suggestion, e.g.
e.m.f./voltage too small
run down quickly/small amount of energy
voltage not steady
current too small
resistance too large
B1
[1]
(c) (i) 1. 2.7 (V) ecf 3 × (a)(i)
2. correct wiring in series and connected to voltmeter
B1
B1
[1]
[1]
B1
B1
[1]
[1]
(ii) 1. 0.9 (V) ecf = (a)(i)
2. correct wiring in parallel and connected to voltmeter
4
Paper
42
(a) measures all ten together and divides by ten
B1
how stops marbles moving, e.g.
in a groove
between two rulers
5 or more in a line shown touching each other
B1
how ends are marked, e.g.
use of blocks
correct use of set squares
B1
[3]
alternative methods:
methods of measuring one marble can score max. 2
measuring all 10 and averaging
(B1)
technique, e.g.
set squares/blocks with one marble
circumference from:
string/paper rolled round marble then ÷ π
ink dot on marble and roll then ÷ π
(B1)
(b) (i) 16.8(0) mm / 1.68(0) cm cao (unit required)
(ii) diameter (of same marble) measured more than once in different direction(s)
© Cambridge International Examinations 2013
B1
[1]
B1
[1]